adrian, 1999 toyota corolla headlight relay. Check the attached links,instruction and guides, Good luck
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https://www.youtube.com/watch?v=TG3zx8cCREA
https://www.2carpros.com/questions/toyota-corolla-1998-toyota-corolla-headlight-wont-turn-on
http://parts.lakelandtoyota.com/showAssembly.aspx?ukey_assembly=516617&ukey_make=1060&modelYear=1999&ukey_model=15430